Does anyone know the meaning of (presumably plastic) 5-pointed stars mounted on the fronts of houses, usually next to the doors? They appear to be plastic and I've seen them in various colors. White is common. There is only one per house. They have a radius of about one foot. I saw a lot of them when we traveled through KY, TN, NC and into Georgia about 2 weeks ago. There are a few of them here in the Chicago suburban area. I'm aware that the five-pointed star is a symbol of witchcraft and wonder if the inhabitants of these houses are proclaiming that.